单项选择题

He spent a lot of time ______ learning English.

A．in
B．on
C．with
D．to
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单项选择题
Please tell me ______.
A．what do you want
B．what want you
C．what you want
D．you want what
单项选择题
My grandfather ______ ,the Red Army 40 years ago.
A．joined
B．took part in
C．attended
D．joined in
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